I’m having success with dwarf gourami and a lot of tetras. The only tension in the tank is the single angle and 2 dwarf gourami drifting into each others zones. Nothing heavy though . My pleco appears out of nowhere and muscles his way through the planted substrate.
I’ve had a great experience with the Fluval 307. Great adjustable flow. Joyous hose connect. Easy of cleaning. Good looking unit. Quiet as a mouse and powerful if you need it.
Hey your water is your water. fish will live in it as long as things are in balance. We can over do things sometimes. Choose the fish ball park and let it happen. Marc